Delete multiple keys in the Linux operating system

You can use the xargs command of Linux and the DEL command of Redis to delete multiple
target keys. This topic describes the operations in details.

The xargs command is used in the Linux operating system. The command passes a list
of parameters to other commands in segments. Therefore, the system does not need to
process a long list of parameters and can avoid related issues. The command can be
used independently, or used with pipeline operators, relocation operators and other
commands.

Cautions

The KEYS command may cause high CPU usage. Use this command during off-peak hours.

If you use the KEYS command in a large database, the command affects the database performance. We recommend
that you use this command in a database that contains small amounts of data.

Procedure

Install ApsaraDB for Redis in the Linux operating system.

yum install redis

Run the following command to delete multiple target keys in a database. In the following
figure, "test *" contains multiple target keys, such as test1, test2, and test3.